---
id: "upstage/solar-decide-flash"
also: ["upstage/solar-decide-flash-20261008"]
card_usd_per_m: "0.05 in, 0.0 out, at upstage"
cheapest_list_usd_per_m: "0.05 in, 0.0 out, at upstage on openrouter"
cheapest_effective_usd_per_m: "0.0996 in, 0.0 out, at upstage/zdr on openrouter"
context: 524288
max_output: 471859
input: ["text"]
output: ["decisions"]
released: "2026-10-08"
api: ["/api/alpha/decisions"]
endpoints: 2
gateways: "openrouter (2)"
no_training: 2
trains: 0
retains_prompts: 1
---
# Upstage: Solar Decide Flash

Solar Decide Flash is Upstage's low-latency structured decision model, a faster variant of [Solar Decide](/upstage/solar-decide) built on Solar Mini 4 and served through the System One (`/v1/systemone`) API. Instead of...